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Cooling a little on driver's side but hot air on the passenger side.

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Sounds like the selector switch which makes the vent switch to different sections is not doing its job. Check to see if working by moving to defrost then to other settings. Also try fresh air to recirc air, could be stuck. Also move around your temp control switch. If you dont hear vent moving or switch feels to easy then start with under dash, you will have to take vents apart to get to area where they are, one of the vacuum lines could have come off. Your problem is in one of the areas I mentioned.

Posted on Jul 24, 2009

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Hot air from drivers side cool air from passenger side


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Oct 15, 2015 | 2009 Hyundai Sonata

1 Answer

Why is it blowing warm on and off on the driver side and blowing cool on the passenger side?


Here's is a little background and a couple of thoughts. Turning to the background, first. The heater/air conditioner system in your 02 uses the same set of ducts located in the instrument panel. In turn, those ducts are linked to what can be considered miniature version of the cooling system in the engine compartment (yes, this is a greatly simplified version). The whole system, in fact, is run off the main heater/ac system, however, it has a separate series of controls so that it can function properly.

When you dial a temperature, a signal is sent to the heater/cooling system telling the system to open a series of baffles, directing a flow of heated or cooled anti-freeze/coolant to the proper "radiator" behind the face of the instrument panel. In turn, the fan system activates a series of doors behind the instrument panel so that the flow of air is directed through the "radiator" and into the passenger compartment. This is essentially the heater/cooling system work.

Now, you say that the driver's side is hot, while the passenger side is cool. What has happened is that the flow of heated coolant that is supposed to heat the passenger side of the duct system is blocked. Since there is no heat to warm the air that is flowing past the fins of the "radiator," the flowing air remains cool to cold, depending on the weather and ambient temperature. The result is that one side of the car remains cool. And, since the other side of the "radiator" is normal and the air is heated, it is warmed.

That is the most likely explanation for this.

Another possibility is that the baffles themselves are stuck and the coolant that is supposed to be directed to the passenger side is not being directed their.

Either way, your technician has some work ahead.

Jun 05, 2015 | 2002 GMC Envoy XL

1 Answer

NO COOL AIR COMES OUT THE PASSENGER SIDE VENTS, ONLY HOT AIR


I'll just take a wild step and assume that this is on a GM vehicle, SUV or truck most likely.

Your problem is what is referred to as the blend door actuator. Its a little electrical motor that rotates a little door that mixes hot and cold air. The passenger side one is bad. You probably also hear an annoying little "ticking noise" from beneath the dash on start up or power up. That is the blend door being stuck. Good luck!

Apr 29, 2014 | Cars & Trucks

2 Answers

BMW AIR CONDITIONING BLOWS HOT AIR ON PASSENGER SIDE.


Multi-Diag Access J2534 has the function for air condition, such as Diagnosis of cooling electronic,
Reading settings cooling circuit,Test servo actuators

Apr 12, 2013 | 2000 BMW 3 Series

1 Answer

On my 2009 1500 silverado, the driver side air cond blows HOT air as if the heat is on, but if you cycle the driver side temp control up then back down several times or turn the truck off like short trips...


There is a damper that controls whether heat or cooling or somewhere between that is controlled by the temperature controls. A separate system is controlling the passenger side and the driver side heating and cooling. I hope this is still under warrantee. If not it might be a big job to diagnose whether the problem is in the heat and cool controller, the wiring or the damper device. I hope this helps.

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2 Answers

The heater blows out cold air on pass. side. Warm air on drivers side


Your car is equipped with "Dual Climate Control". Make sure that the temperature control for the passenger side is turned to the "Hot" position. If it is already at the hot position and still blowing cold air, then you most likely have a failed passenger blend-air door motor or a broken passenger blend-air door.

The motor can be replaced with very little labor (a little over 2 hours) but if the door is broken, you are talking about major surgery...total dash removal....about 8 hours of labor.

Dec 18, 2010 | 1996 Buick Park Avenue

1 Answer

Gets hot on passenger side stays cold on drivers side on 2004 chevy impala


Possible that the vent is blocked if you meant that the car is not cooling with the AC. If so check the flow of air on the vent , remove and clean the vent.
However if there is heat coming in to the passenger side then the engine room insulation can be open or there is a possible leak from the engine room that allows hot air to flow into the passenger side than the driver side.
I hope this was what you meant, if not clarify once again.

Nov 03, 2010 | Chevrolet Impala Cars & Trucks

1 Answer

2000 lincoln ls ac is blowing hot air on pass side


On the central console is the A/C module. Inside A/C module are driver's side & passenger's side air flaps for mixing hot & cold air and directed air flows towards driver's side & passenger's side according to driver commands. The passenger's side flap for mixing hot & cold air according to driver commands is bad. Flaps are actuated by electrical step by step motors. Could be damaged the flap actuator (motor), the flap mechanism (blocked in "HOT" air position), and / or electrical supply wires. You must access the passenger's side flap for mixing hot & cold air, and see what happens when you command cold air to the driver's side: flap mechanism, flap actuator, supply wires, ... Repair & replace bad pieces and test the A/C system.

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1 Answer

Cold AC but weak Airflow---Also Driver side not as cold as passenger


The air doors are controlled by actuators that on of them or so may need replacing.

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